I recently had to take a very firm stand with a co-worker who had the audacity to eat the crumpets I had left in the kitchen at work.
Unrestrained anger
You can imagine my fury. After a little detective work I was able to track down the culprit, who I reprimanded in no uncertain terms. He was embarrassed (as he should be) and the oily plate from which he had eaten MY crumpets was still sitting brazenly on his desk. I am considering going to HR about this theft.
Crumpet tips
As a side thought- if you've never tried crumpets, you should. They're particularly divine when spread thickly with chocolate spread, which melts through the little holes in a heavenly manner.